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为解决各调频发射机开机时载波频差对天线阵列方向图综合的影响,这里利用了DFT最大值谱线及与其相邻两根谱线系数的实部(或虚部)进行插值得到各个发射机载波频率的估算值,然后提出了一种有效的补偿方法,以减少频差引起的瞬时相位差对方向图综合的影响。仿真实验表明:此方法频率估算精度较高,采用该方法可以有效的解决频差对天线阵列方向图综合的影响。
In order to solve the influence of the carrier frequency difference of each FM transmitter on the antenna array synthesis, the real part (or the imaginary part) of the DFT maximum spectrum line and the two adjacent line spectral coefficients are interpolated to obtain each emission Then, an effective compensation method is proposed to reduce the influence of the instantaneous phase difference caused by the frequency difference on the pattern synthesis. Simulation results show that this method has a high frequency estimation accuracy, and this method can effectively solve the impact of frequency difference on the antenna array pattern synthesis.